Subsector 4534 was a region of space in Sector 450. This sector was surveyed by the USS Ganymede and the USS Puget Sound in 2364.
Prior to stardate 41775, both Federation starships were ordered to avoid subsectors 4534 to 4432. That order had been supported by Admiral Marcia Meldal-Johnsan and dealt with diplomatic negotiations with the New Zealand government. The ships were to acknowledge this order on subspace com net security code 045, code 100 alpha. (TNG: "Conspiracy")